package com.flmz.common.security.handler;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.StrUtil;
import com.flmz.common.core.domain.R;
import com.flmz.common.core.enums.ResultCode;
import com.flmz.common.security.exception.ServiceException;
import jakarta.servlet.http.HttpServletRequest;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.support.DefaultMessageSourceResolvable;
import org.springframework.validation.BindException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.util.Collection;
import java.util.Objects;
import java.util.function.Function;
import java.util.stream.Collectors;

/**
 * 全局异常处理器
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {
	/**
	 * 请求方式不支持
	 */
	@ExceptionHandler(HttpRequestMethodNotSupportedException.class)
	public R<?>
	handleHttpRequestMethodNotSupported(HttpRequestMethodNotSupportedException e,HttpServletRequest request) {
		String requestURI = request.getRequestURI();
 		log.error("请求地址'{}',不⽀持'{}'请求", requestURI, e.getMethod());
		return R.fail(ResultCode.ERROR);
	}

	/**
	 * 用户已经存在异常
	 */
	@ExceptionHandler(ServiceException.class)
	public R<?> handleServiceException(ServiceException e, HttpServletRequest request) {
		String requestURI = request.getRequestURI();
		ResultCode resultCode = e.getResultCode();
		log.error("请求地址'{}',发生业务异常: {}", requestURI, resultCode.getMsg(), e);
		return R.fail(resultCode);
	}

	/**
	 * 拦截运行时异常
	 */
	@ExceptionHandler(RuntimeException.class)
	public R<?> handleRuntimeException(RuntimeException e, HttpServletRequest request) {
		String requestURI = request.getRequestURI();
      log.error("请求地址'{}',发生运行时异常.", requestURI, e);
		return R.fail(ResultCode.ERROR);
	}
	/**
	 * 系统异常
	 */
	@ExceptionHandler(Exception.class)
	public R<?> handleException(Exception e, HttpServletRequest request) {
		String requestURI = request.getRequestURI();
      log.error("请求地址'{}',发生异常.", requestURI, e);
		return R.fail(ResultCode.ERROR);
	}

	/**
	 * 参数校验异常捕获
	 */
	@ExceptionHandler(BindException.class)
	public R<Void> handleBindException(BindException e) {
		log.error(e.getMessage());
		String message = join(e.getAllErrors(),
				DefaultMessageSourceResolvable::getDefaultMessage, ", ");
		return R.fail(ResultCode.FAILED_PARAMS_VALIDATE.getCode(), message);
	}

	private <E> String join(Collection<E> collection, Function<E, String>
			function, CharSequence delimiter) {
		if (CollUtil.isEmpty(collection)) {
			return StrUtil.EMPTY;
		}
		return collection.stream().map(function).filter(Objects::nonNull).collect(Collectors.joining(delimiter));
	}
}